
    <nz-tree
      #treeCom
      [nzData]="nodes"
      nzCheckable="true"
      nzMultiple="true"
      [nzCheckedKeys]="defaultCheckedKeys"
      [nzExpandedKeys]="defaultExpandedKeys"
      [nzSelectedKeys]="defaultSelectedKeys"
      (nzClick)="nzClick($event)"
      (nzCheckBoxChange)="nzCheck($event)">
    </nz-tree>
  